The main ports in South Korea on the Yellow Sea are Incheon , Gunsan (Kunsan) , and Mokpo.

Key Yellow Sea Ports in South Korea

  • Incheon (Inchon) – A major seaport on the northwest coast, serving as the principal port for the Seoul metropolitan area and handling several million TEU of container traffic annually.
  • Gunsan (Kunsan) – A mid‑sized industrial port city on the Yellow Sea coast in North Jeolla Province, important for manufacturing exports and approached via channels from the Yellow Sea.
  • Mokpo – Listed among South Korea’s major Yellow Sea ports, located further south on the west coast and serving as a regional port city.

These three are the main answers if you are looking for “a port in South Korea on the Yellow Sea,” with Incheon being the largest and best known internationally.